Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab97312b939be355…

MALICIOUS

PDF

76.0 KB Created: 2021-03-30 15:25:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4ffd4cb432ed34a3f8bc5be9d848408 SHA-1: 52466138a481d0eee46a1c03c29c946d06480669 SHA-256: ab97312b939be35503f4121fa67f96e20c1a5d589c35997db029dc4ab34da114
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'seumenha.ru', which is likely part of a phishing or scam campaign disguised as a file conversion service. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/award?keyword=jpg+file+to+pdf+merge
    • http://nanebaxexob.getenjoyment.net/enlightenment_now_pinker.pdf
    • https://cdn-cms.f-static.net/uploads/4378165/normal_6061a1661d6d6.pdf
    • https://cdn-cms.f-static.net/uploads/4371514/normal_603aa0f2180ac.pdf
    • https://static.s123-cdn-static.com/uploads/4467560/normal_5ff360ff658cd.pdf
    • http://kazotapojiwi.mywebcommunity.org/what_are_the_different_examples_of_expository_texts_brainly.pdf
    • https://cdn-cms.f-static.net/uploads/4386837/normal_60461ccc2ddd1.pdf
    • http://ruvenebigolusep.mywebcommunity.org/wusigodeloj.pdf
    • http://policyhelpcenter.com/40809441163vsz4j.pdf
    • http://kobazugipodiv.medianewsonline.com/chicago_cubs_tv_schedule_2020.pdf
    • http://nefuzixitelu.iblogger.org/77557902440.pdf
    • https://cdn-cms.f-static.net/uploads/4402507/normal_6016a558dec9e.pdf
    • http://huseyincanx.com/cesur_ve_gzel_english_subtitles_epiy5rbf.pdf
    • http://prod-fruit.space/addzest_max950hd_manual2s4e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/suximawo/mobile_software_updater._exe.pdf
    • https://s3.amazonaws.com/zaxuledo/98872080772.pdf
    • https://s3.amazonaws.com/pulujolatepuv/aha_blood_pressure_measurement_guidelines_2019.pdf
    • http://lufeneweb.epizy.com/61981372778.pdf
    • https://s3.amazonaws.com/jejulurowev/73151325604.pdf
    • http://vawolibosabope.rf.gd/besatutoxeluwawiro.pdf
    • http://wupenokisu.epizy.com/pavel_tsatsouline_wife.pdf
    • http://toxifiv.myartsonline.com/nucleophilic_addition_reaction_mechanism.pdf
    • https://s3.amazonaws.com/libosokune/asterix_and_obelix_1996_pc_game.pdf
    • https://s3.amazonaws.com/ruzumeb/erik_satie_gymnopedie_1_sheet_music.pdf
    • https://s3.amazonaws.com/jidosatikim/i_am_still_standing_piano_sheet_music.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed52.bin
5e75b581879dcee14fd192b8a98e11c3ef9775543d6c52168bf68f0fe848d7ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 4960 bytes
font_01_sfnt_off0000fe25.bin
9153aba20c1fe2ca8f29c76f8366020c446b85ade73862932bb9853910ece62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE25 10636 bytes

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